Sewing machine



June 6,` 1944. A. B. cLAY'roN SEWING MACHINE Original Filed Aug. 29. '1941 2 sheets-sheet 1 Illl||l||||l||llJ llllllllllllllllllllllllllll l1 l. IPII Anc/few B. Cayon Strom June 6, 1944. A. B. cLAY'roN SEWING MACHINE Original Filed Aug. 29, 1941 2v Sheets-Sheet 2 3 /n'a'rew B. Clayton Marr/m43 Patented June 6, 19,44

SEWING MACHINE Andrew B.,Clayton, Union, N. J., assigrnorto The Singer Manufacturing Company, Elizabeth,

N. J., a corporation of New Jersey Original application August 29, 1941, Serial No.

Divided and this application March 24, 1943, Serial No. 480,277

G Claims.

of that portion of the stitch-forming mechanism whose thread it controls.

Another object of the invention is to' provide improved means to prevent dust, lint and other foreign matter from entering the compartment vin the machine frame in which the take-up is mainly located and to prevent the end ofthe thread from passing into that compartment and becoming entangled with or wound about the `take-up or other moving parts in the compartment, should the thread break.

With the above and other objects in View, as will hereinafter appear, the invention comprises the devices, combinations, and arrangements of parts hereinafter set forth and illustrated in the accompanying drawings of a preferred embodiment oi the invention, from `which the several features of the invention and the advantages attained thereby will be readily understood by those skilled in the art.

In the drawings, Fig. 1 is a front elevation of a two-thread chain-stitch sewing machine embodying the present invention.

' Fig. 2 is a right end View, partly in section, of the machine shown in Fig. 1. p

Fig. 3 is a vertical sectional View taken substantially on the line 3 3 of Fig. 2.

Fig. 4 is a detail sectional view taken substantially on the line 4 4 of Fig. 3 showing the looper-thread take-up cam and the means Afor adjustably securing it to a belt-sprocket l'iXed to the main shaft of the machine.

Referring more specifically to the drawings, the invention is disclosed as embodied in a sewing machine having a frame comprising a base I,'up` right standard 2, overhanging arm 3, terminating in a hollow head 4, closed at its forward face by a face-plate 5. The standard is formed with 'a vertical internal partition 2EL whichv extends from the bottom wall of the base I to the upper wall of the arm 3 and divides the space within the standard into a kbelt compartment 54 and aL splash-lubrication compartment 54a. This splash lubrication compartment overlies an oil reservoir R in the base I and permits the oil therein to be splashed into Contact with the working parts therein by the action of a portion of the looper through a thread-guiding tube 42, through actuating mechanism therein. The base is formed with upright Vportions 6 and 8 which support a cloth-plate 9. A guard member orY apron I3, hinged on a pin I4 supported rby the cloth plate 9, overlies a portion of the actuating mechanism, designated generally as at, of a' 'chain'- stitch looper L, and prevents accidental contact therewith. A

Journaled lengthwise within theA arm 3 is a main or needle-bar actuating shaft I5, having secured to it, atits rear end, by set screws I5', a combined beltand balance-wheel I6 by means of which the machine may be driven from any suitable source of power. The forward end of the shaft I5 hassecured to it a crank-disk I'l carrying a crank-pin I8 connected, by a'link. I3, vwith a collar 29, secured upon a hollow needle-bar 2l reciprocably mounted in' the head 4. At its lower end the needle-bar carries an eye-pointed needle 22 which cooperates with the looper L in the formation of stitches'.

Thread 11'. forthe needle passes from a suitable source of supply through a thread-eye 29`XVformed in a kink-removing plate V3l) (Figs. 1 and V2) Asecured to a tension-bracket 3| thencel aroundV the ledge of the plate and back through a threadleye thread-guide 33, thread-nipper 34, back through l the thread-guide 33, through a thread-eye `35 formed vin an adjustable arm 36, rsecured to the machine arm, through a take-up 31, toa threadeye 38 formed in a plate 39'adjustably secured to the face plate'5, and thence to the eye of the needle.' Y

The looper'thread Z extends from a suitable source of supply to a` thread-eye 4 0Xrformed in 'a .tension-supporting plateA 495' thence through a thread tension 4U, through a' take-up 4I, down a thread-guide 43, to the looper L. Y

Thetake-up Y4I comprises a thread-controlling cam disk 44, adjustably securedto a belt-sprocket 45 xed upon the main shaft I5. The cam 'disk 44 is secured to fthe sprocket 45 by screwsMf which pass throughV slots 44b in the diskand are threaded into the sprocket. The 'C'am disk operates through ar slottedV stripper-plaate-AB carrying a U-shapedV threadstripp'er 41 Vand tmead-gudes.48. A' 'l As shown most clearly in Figs. 2 and 3,"the belt-sprocket 45 is frictionally secured upon a sleeve 49 which, in turn, is secured to the shaft i5 by means of set-screws 50 and forms a part of a driving connection between the rotary main ,arrows in Fig. 3.

tion, what I claim herein is:

shaft l5 and a rotary looperand lower-feed actuating shaft 5l journaled in bearings provided by the base of the machine. The other elements of the driving connection between the two shafts consist of a similar belt-sprocket 52 secured upon the shaft 5l and a connecting clip-belt 53 surrounding the sprockets. 'Ihe driving connection between the two shafts is located in the compartment 54, formed in the rear portion of then standard 2, which compartment is normally closed by upper and lower cover-plates 55 and 55, respectively, secured to the standard by screws 5l and 58.

It is sometimes required that the timing of the take-up cam be varied relative to the timing of the looper mechanism. This may readily be effected by adjustingfthe take-up disk angularly about the axis of the shaft l5. Toaccomplish this the hand-wheel I5, plate 55, and a cup-like guard element 5S (Fig. 3) which surrounds the lshaft I5 and the hub of the sleeve 49 are rst removed.v After those elements have been removed the screws 44a may be released and the cam-disk rotated slightly about the axis of the shaft after which the screws 44a are again tightened and the guard element; cover-plate and hand-wheel are replaced.

The periphery of the take-up disk 44 projects through a slot llia in the take-up 'stripper plate .secured to the sprocket 52 on the looperand feed-actuating shaft 5I. During running of the machine the fan 60, which has radially extending and backwardly inclined vanes 6I, draws air into the compartment 54 through an opening 62 formed in the cover-plate 56, coaxial with the fan, andforcesit upwardly and discharges it through the slot .t6a in the stripper-plate 45.

Having thus set forth the nature of therinven- .1. A'sewing machine comprising a frame; a

Aneedle-bar actuating shaft and a-loop-taker actuating shaft journaled therein; a driving connection between said shafts including a sprocket secured to each shaft and a belt connecting said sprockets; a thread take-up mechanism comprising a pair of stationary thread-guides and a rotary take-up disk acting on the thread extending between said thread-guides; and means for adjustably securing .said take-up disk to one of said sprockets to permit of angular adjustment of the disk relative to its supporting sprocket. 2. In a sewing machine having a frame pro- `vided with a slot in one wall thereof, stitch-form- -ing mechanism, work-feeding mechanism and a take-up mechanism having a portion extending through said slot; the improvement which consists in the provision of means embodied in and actuated by the sewing machine for creating and maintaining a flow of air through said slot and CFI around and past said take-up mechanism to prevent the accumulation of foreign matter in the region thereof.

3. A sewing machine comprising a substantially closed frame; a rotary shaft journaled therein; a rotary take-up element carried by said shaft and located mainly within said frame but having a portion projecting outwardly therefrom through a slot in a wall of said frame for cooperation with suitable thread-guidesj-and means for effecting-a flow of air outwardly from said frame about said take-up element.

4. A sewing machine comprising a frame having a base, .a standard and an overhanging bracket-arm, said standard being formed with a compartment affording a housing for a driving connection; a rotary shaft journaled lengthwise of said bracket-arm and having a portion in said compartment; a second rotary shaft journaled in said base and having a portion in said compartment; a driving connection between said shafts located in said compartment; a rotary take-up disk carried by one of said shafts mainly in said compartment and having a portion projecting outwardly therefrom through a slot in a wall thereof for cooperation with suitable threadguides; and means actuated by the other of said shafts for effecting a flow of air outwardly from said compartment about said take-up disk.

5. A sewing machine comprising a frame hav-- ing a base, a standard and an overhanging bracket-arm, said standard being formed with a compartment affording a housing for a driving connection and having an air inlet; aY rotary shaft journaled lengthwise of said bracket-arm and having a portion in said compartment; a second rotary shaft journaled in said base and having a portion in said compartment; a driving connection between said shafts located in said compartment; a rotary take-up disk carried by one of said shafts mainly in said compartment and having a portion projecting outwardly therefrom through a slot in a wall thereof for cooperation with suitable thread-guides; and an air pump secured upon the other of said shafts in said compartment for drawing air in through said air-inlet and discharging it through said slot y about said take-up disk.

6. A sewing machine comprising a frame having a base, a standard and an overhanging bracket-arm, said standard being formed with a compartment affording a housing for a driving connection and having, adjacent its lower end, an air inlet; a rotary needle-bar driving shaft journaledrlengthwise of said bracket-arm and having a portion in said compartment; a rotary looper-actuating shaft journaled in said base and having a portion in said compartment; a driving connection between said shafts located in said compartment; a rotary take-up disk carried by said needle-bar driving shaft and located mainly in said compartment and having a portion pro jecting outwardly therefrom through a slot in a wall thereof for cooperation with suitable thread-guides; and a vane type fan secured upon the said loopen-actuating shaft in said compartment for drawing air'in through said air-inlet and discharging it through said slot about said take-.up disk.

ANDREW B. CLAYTON. 

